Trigonally Distorted Hexacoordinate Co(II) Single-Ion Magnets.

ABSTRACT: By simple reactions involving various cobalt(II) carboxylates (acetate and in situ prepared pivalate and 4-hydroxybenzoate salts) and neocuproine (neo), we were able to prepare three different carboxylate complexes with the general formula [Co(neo)(RCOO)2] (R = -CH3 for 1, (CH3)3C- for 2, and 4OH-C4H6- for 3). The [Co(neo)(RCOO)2] molecules in the crystal structures of 1-3 adopt a rather distorted coordination environment, with the largest trigonal distortion observed for 1, whereas 2 and 3 are similarly distorted from ideal octahedral geometry. The combined theoretical and experimental investigations of magnetic properties revealed that the spin Hamiltonian formalism was not a valid approach and the L-S Hamiltonian had to be used to reveal very large magnetic anisotropies for 1-3. The mea

SUBMITTER: Nemec I 

PROVIDER: S-EPMC8839918 | biostudies-literature | 2022 Jan

REPOSITORIES: biostudies-literature